For 2007.5-2024 6.7L Cummins owners, upgrading the intake manifold is a popular modification to improve airflow and performance. One key component that many enthusiasts choose to remove is the grid heater. The 6.7 Cummins grid heater delete eliminates restrictions in the intake manifold, reduces the risk of heater bolt failure, and enhances overall engine efficiency.
In this guide, we’ll explore the benefits, installation process, and potential drawbacks of deleting the grid heater on your 6.7 Cummins.
1. Why Delete the Grid Heater on a 6.7 Cummins?
The grid heater is a pre-heating device located in the intake manifold, designed to assist with cold starts by warming incoming air before it enters the combustion chamber. However, many Cummins owners opt for a grid heater delete due to the following reasons:
✔ Prevents Grid Heater Bolt Failure
One of the biggest concerns with the factory grid heater is the possibility of bolt failure. If the heater bolt loosens and falls into the engine, it can lead to catastrophic damage to the pistons, valves, and even the turbocharger. Many forum users have reported engine failures due to this issue, making the grid heater delete a highly recommended upgrade.
✔ Improves Airflow and Performance
The factory intake manifold is already restrictive, and the grid heater plate further blocks airflow. By installing a 6.7 Cummins grid heater delete, you allow for smoother, unrestricted airflow, leading to better throttle response, improved combustion efficiency, and increased horsepower. Many Cummins owners also choose to upgrade their intake manifolds at the same time to maximize airflow improvements.
✔ Reduces Carbon Buildup
The factory grid heater tends to collect carbon deposits over time, which can clog the intake manifold and reduce engine efficiency. By deleting it, you can maintain a cleaner intake system and reduce maintenance issues.
2. How to Perform a 6.7 Cummins Grid Heater Delete
Required Tools and Components:
- SPELAB 6.7 Cummins Grid Heater Delete Kit
- SPELAB Intake Manifold Upgrade (optional but recommended)
- Socket set
- Torque wrench
- Gasket remover
- New intake manifold gasket
Step-by-Step Installation Guide:
🔧 Step 1: Disconnect the Battery
For safety, always disconnect the battery before working on the electrical system.
🔧 Step 2: Remove the Intake Horn and Manifold
- Loosen the intake clamps and remove the intake piping.
- Unbolt and carefully remove the intake horn to access the intake manifold.
- Remove the intake manifold to fully expose the grid heater.
🔧 Step 3: Remove the Factory Grid Heater Plate
- Locate the grid heater plate inside the intake manifold.
- Unbolt it and carefully remove it to prevent debris from falling into the engine.
🔧 Step 4: Install the Grid Heater Delete Plate
- Place the SPELAB grid heater delete plate in the same position as the removed heater plate.
- Secure it using the provided bolts and torque them to spec to ensure a proper seal.
🔧 Step 5: Reinstall the Intake Manifold and Intake Horn
- If upgrading, install a performance intake manifold for maximum airflow benefits.
- Reinstall the intake horn and reconnect the intake piping.
- Check for any loose connections before proceeding.
🔧 Step 6: Reconnect the Battery and Start the Engine
- Reconnect the battery and start the engine to ensure everything is functioning properly.
- Check for air leaks and verify smooth operation.
3. Pros and Cons of a 6.7 Cummins Grid Heater Delete
✅ Pros:
✔ Improved Airflow – Eliminates intake restriction for better performance.
✔ Prevents Engine Damage – Avoids potential grid heater bolt failure.
✔ Reduces Carbon Buildup – Helps maintain a cleaner intake manifold.
✔ Enhanced Throttle Response – Leads to quicker turbo spool-up.
❌ Cons:
✖ Cold Start Issues – Without the heater, cold-weather starts may be more difficult.
✖ Requires Proper Installation – If not sealed correctly, it could lead to air leaks.
4. Should You Upgrade the Intake Manifold When Deleting the Grid Heater?
Many 6.7 Cummins owners choose to upgrade to a high-performance intake manifold at the same time as a grid heater delete for the following reasons:
✔ Eliminates Factory Restrictions – The stock intake manifold is designed for emissions compliance, not performance. An upgraded intake manifold significantly improves airflow.
✔ Reduces Turbo Lag – More efficient airflow means quicker turbo response, which enhances acceleration.
✔ Prevents Future Clogs – A larger intake manifold reduces the buildup of carbon deposits, keeping the intake system cleaner for longer.
If you are already removing the intake manifold to delete the grid heater, it makes sense to install an upgraded SPELAB intake manifold for maximum performance benefits.
5. Should You Delete the Grid Heater on Your 6.7 Cummins?
The decision to perform a grid heater delete depends on your climate, driving needs, and performance goals.
🔹 If you live in a warm climate – A grid heater delete is highly beneficial since cold starts are not a major concern.
🔹 If you drive in extremely cold conditions – Consider keeping the heater or using alternative heating solutions, such as an intake heater relocation kit.
🔹 If you prioritize performance and reliability – A grid heater delete is a great upgrade to prevent failures and enhance airflow. Pairing it with a SPELAB intake manifold will further improve engine efficiency.
6. Conclusion: Is a 6.7 Cummins Grid Heater Delete Worth It?
For 2007.5-2024 6.7L Cummins owners, deleting the grid heater can provide significant airflow improvements and prevent engine damage caused by heater bolt failures. However, it’s important to consider cold-weather starting concerns and ensure proper installation.
If you’re looking to enhance your 6.7 Cummins performance, prevent costly repairs, and optimize intake efficiency, the SPELAB Grid Heater Delete Kit is a must-have upgrade!
For maximum benefits, pairing the grid heater delete with a SPELAB intake manifold upgrade ensures unrestricted airflow, better turbo response, and a cleaner intake system.
🚛 Upgrade today and experience the benefits of a high-performance intake system!